The aim of this research is to develop a fog display which enables observers to recognize a 3D shape of virtual objects. A fog display is one of immaterial display systems. Foregoing systems (e.g. [Rakkolainen et al. 2005]) realized to project objects and images floating in mid-air. However, these systems provided only 2D images on a flat screen. We propose a novel fog display system consists of one cylindrical fog screen and multiple projectors, which brings motion parallax of the virtual object to observers. The concept of the proposed display is similar to 360-degrees viewable 3D displays which utilize projection of multiple images, such as Hitachi's Transpost [Otsuka et al. 2006] and Sony's RayModeler [Ito et al. 2010]. The advantage of the proposed fog display is that the proposed display enables direct touching operation to the virtual objects by observers' hands.